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中文摘要：
以内蒙古河套灌区为研究背景,通过建立区域水盐运动模型模拟分析干排水控盐效果的影响因素。结果表明：气候越干旱,干排水控盐效果越好;插花式的荒地布置形式有助于排水效果的提高;耕荒比对控盐效果存在临界值,当耕荒比达到临界值,耕地开始脱盐,但是随着耕荒比的进一步减小,所增加荒地的干排控盐作用将会减小甚至没有作用。
英文摘要：
A mathematical model was built to simulate the regional water-salt dynamics for analyzing the influencing factors of salinity control effect of dry drainage in Hetao Irrigation Area,Inner Mongolia,China.The results show dry drainage has better effects on salinity control when the climate is more arid,or the fallowed area is larger and interspersed.A threshold exists for the optimal ratio of irrigated area to fallowed area,above which irrigated land begins to desalinization.But the salinity control effect of the additional fallowed area would not proportionately increase but tends to decrease or even disappear.
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